feat: develop example content for openmfp update

[rrogoda]

Develop example content for OpenMFP's local getting started

Changes:

Add dedicated WebComponent for showcase examples

• Add example for "Definition of an Entity"
• Add example for "Defining a iframe based Micro Frontend integration"
• Add example for "Update of browser path when navigating in the Microfrontend's virtualtree"
• Add example for "Showcasing a Dashboard like page that integrates one or two example Web Components"

Refers to :
#76

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1 out of 2 committers have signed the CLA.

✅ nexus49
❌ Rafał Rogoda

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